What travelers should know about flight cancelations as American Airlines works to resume operations slowed by difficult winter storm conditions.

American Airlines said Winter Storm Fern resulted in over 9,000 flight cancellations, the "largest weather-related" disruption in its history.

Airlines have largely recovered from winter storm Fern’s snow and ice, but American Airlines continues to struggle. As of midafternoon, more than 950 American flights scheduled for Tuesday have been scrapped.

American Airlines is adding direct flights from Lehigh Valley International Airport to Chicago this spring. Nonstop flights from the Lehigh Valley to Chicago O’Hare will be offered twice daily beginning May 21,

HARRISBURG, Pa. (WHTM) – Passengers aboard an already-delayed American Airlines flight were stuck for nearly three hours at a Pennsylvania airport, until after 3 a.m., because of an equipment malfunction and an apparent lack of airline staff to help the passengers off the flight another way.

The Dallas-based carrier has added flights from New England and Seattle to ferry fans who plan to attend the NFL’s biggest game.

Charlotte Douglas airport remained open as the ground stop applied to American flights only.

Winter storms drove airline cancellations, hitting American Airlines Q1 revenue. Read the full analysis of what it means for airline stocks here.